[Yukon Jack]

Put the double wall top back on my 70 K5 on Sunday. The bolt that goes through the visor into the top won't tighten down - the nut inside the top appears to be just spinning. It's doing this on both the driver's and passenger side.

Any suggestions on a fix to this problem? I tried to put some pressure on the bolt to the side and also tried to hold it down to see if I could get the nut to stop spinning, but no luck.